CN216837138U

CN216837138U - Methanol water reforming hydrogen production device

Info

Publication number: CN216837138U
Application number: CN202220286101.XU
Authority: CN
Inventors: 张洋
Original assignee: Enli Hydrogen Energy Technology Chongqing Co ltd
Current assignee: Enli Hydrogen Energy Technology Chongqing Co ltd
Priority date: 2022-02-11
Filing date: 2022-02-11
Publication date: 2022-06-28
Anticipated expiration: 2032-02-11

Abstract

The utility model discloses a methanol water reforming hydrogen production device, which comprises a group of reforming tubes arranged in parallel, wherein the two ends of each reforming tube are respectively provided with an air inlet end and an air outlet end, and a catalyst is filled in each reforming tube; the gas inlet ends of all the reforming tubes are connected with the same gas inlet distribution tube group, the gas inlet distribution tube group is provided with a alcohol gas inlet joint, the gas outlet ends of all the reforming tubes are connected with the same gas outlet collection tube group, and the gas outlet collection tube group is provided with a mixed gas outlet joint; the outer wall of the reforming pipe is coated with a heating module. The utility model has the advantages that: a plurality of reforming tubes filled with catalyst are adopted to replace a reformer with an independent cavity, and a heating module is arranged on the outer wall of each reforming tube, so that the temperature of the reforming tubes can be more finely adjusted and controlled, the methanol cracking reaction efficiency is ensured, and the working efficiency of a small/miniaturized methanol hydrogen production system can be improved.

Description

Methanol water reforming hydrogen production device

Technical Field

The utility model relates to a methanol-water hydrogen manufacturing technical field, concretely relates to methanol-water reforming hydrogen manufacturing device.

Background

Methanol is a clean, renewable fuel and is readily produced on a large industrial scale. However, the calorific value of methanol is not high, and the methanol cannot meet the use requirement under some scenes, such as serving as fuel of a power system. The method for preparing hydrogen by reforming methanol and water is a way for improving the heat value of fuel, and the heat value of hydrogen is far higher than that of methanol, so that the requirement of a power system on the heat value of fuel can be met. However, when the power system is powered, hydrogen must be stored in a high-pressure state, and the requirement on the material of the hydrogen storage container is high; on the other hand, when the hydrogen storage container is damaged due to hydrogen leakage or collision, the hydrogen storage container is easy to explode to cause serious accidents. Therefore, the method for instantly producing hydrogen by using methanol water as a raw material according to a use scene is an energy utilization mode with great prospect. The technical steps of hydrogen production by reforming methanol and water are roughly divided into several steps of vaporization, catalytic cracking, hydrogen separation and the like, and at present, some experimental projects have been developed for the research, but the whole prototype system has large volume, slow starting and low efficiency, and can not meet the use requirements. In the occasion of needing a small machine, the structure of the whole system must be reasonably arranged, and the structural design of each part should be optimized to meet the use requirement. The methanol-water reforming hydrogen production device is one of the core components of the whole system, and besides the influence of the performance of the catalyst, the flow space velocity, the path and the distribution mode of the alcohol steam in the reforming device greatly influence the cracking catalysis efficiency. The existing methanol-water reforming hydrogen production device generally fills a catalyst in a relatively large reaction cavity, and plans a bent flow channel by arranging a partition plate and the like so as to increase the flowing distance of alcohol steam in the reaction cavity as much as possible and improve the contact rate of the alcohol steam and the catalyst. However, the methanol cracking needs to be carried out at 200-300 ℃, so that the integrated reaction cavity is inconvenient for accurately controlling the reaction temperature, and the catalytic cracking efficiency of the methanol is limited. And the traditional methanol hydrogen production is mainly of a vertical structure, and has large volume and heavy weight. The structure of the reformer is to be optimized.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a methanol-water reforming hydrogen plant.

In order to achieve the above purpose, the utility model discloses technical scheme as follows:

a methanol water reforming hydrogen production device is characterized by comprising a group of reforming tubes which are arranged in parallel, wherein the two ends of each reforming tube are respectively provided with an air inlet end and an air outlet end, and a catalyst is filled in each reforming tube;

the gas inlet ends of all the reforming tubes are connected with the same gas inlet distribution tube group, the gas inlet distribution tube group is provided with a alcohol gas inlet joint, the gas outlet ends of all the reforming tubes are connected with the same gas outlet collection tube group, and the gas outlet collection tube group is provided with a mixed gas outlet joint;

the outer wall of the reforming pipe is coated with a heating module.

The utility model has the advantages that: a plurality of reforming tubes filled with catalyst are adopted to replace a reformer with an independent cavity, and a heating module is arranged on the outer wall of each reforming tube, so that the temperature of the reforming tubes can be controlled more finely, the methanol cracking reaction efficiency can be ensured, and the working efficiency of a small/miniature methanol hydrogen production system can be improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention, in which a pressure measurement module is not shown;

FIG. 2 is a schematic diagram of the layout positions of an alcohol vapor inlet joint, a mixed gas outlet joint and a reforming pipe, and a pressure measurement module is also shown in the diagram;

FIG. 3 is a schematic view of a connection structure between the reforming intake manifold and the reforming pipe;

fig. 4 is a schematic view of an installation structure of the second temperature measurement module.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

As shown in fig. 1 and 2, a methanol-water reforming hydrogen production apparatus includes a set of reforming tubes 130 arranged in parallel, two ends of the reforming tubes 130 are respectively an air inlet end and an air outlet end, and the reforming tubes 130 are filled with a catalyst. The inlet ends of all the reforming tubes 130 are connected with the same inlet distribution tube group provided with an alcohol vapor inlet joint 111, and the outlet ends of all the reforming tubes 130 are connected with the same outlet collection tube group provided with a mixed gas outlet joint 151. The reforming tube 130 is coated on the outer wall thereof with a heating module 160.

The air inlet distribution pipe group comprises a reforming air inlet main pipe 110 and reforming air inlet branch pipes 120, and the reforming air inlet branch pipes 120 are arranged along the arrangement direction of the reforming pipes 130 and are respectively connected with the air inlet ends of all the reforming pipes 130. The middle part of the reforming gas inlet branch pipe 120 is connected with one end of the reforming gas inlet main pipe 110, and the other end of the reforming gas inlet main pipe 110 is connected with the alcohol vapor inlet joint 111.

The air outlet collecting pipe group comprises air mixture branch pipes 140 and air mixture main pipes 150, the air mixture main pipes 150 are arranged along the arrangement direction of the reforming pipes 130 and are respectively connected with the air outlet ends of the reforming pipes 130 through the air mixture branch pipes 140, and the middle parts of the air mixture main pipes 150 are connected with air mixture outlet connectors 151.

In order to control the space occupation of the whole device, in this embodiment, as shown in fig. 3, the reforming inlet manifold 120 penetrates all the reforming tubes 130, and the tube wall of the reforming inlet manifold 120 is sealed with the tube wall of each reforming tube 130, for example, welded. The reforming intake manifold 120 is provided with an intake hole 121 on the wall of each reforming pipe 130, and the intake hole 121 connects the pipe cavity of the reforming intake manifold 120 with the pipe cavity of the reforming pipe 130. The reforming intake manifold 120 is located in each reforming pipe 130, and the pipe wall thereof is covered with a manifold isolation cover 122, and the manifold isolation cover 122 is used for preventing catalyst from entering the intake holes 121.

As shown in fig. 2, in order to make the whole apparatus more compact, all the reforming tubes 130 are horizontally arranged, the tube axes of all the reforming tubes 130 are located in the same horizontal plane, the alcohol vapor inlet joint 111 and the mixed gas outlet joint 151 are respectively arranged on both sides of the horizontal plane, the inlet end of the alcohol vapor inlet joint 111 faces downward, and the outlet end of the mixed gas outlet joint 151 faces upward.

The alcohol steam inlet joint 111 is used for connecting a vaporizer, and the density of the vaporized alcohol water in the vaporizer is reduced and the alcohol water flows upwards, so that the alcohol steam can conveniently enter the vaporizer smoothly by the orientation of the alcohol steam inlet joint 111. And the gas mixture after cracking contains a large amount of hydrogen, and the density of gas mixture further reduces, consequently gives vent to anger the end of giving vent to anger of connecting 151 with the gas mixture and faces upward, is convenient for the gas mixture to discharge smoothly.

All the reforming tubes 130 are divided into at least two heating tube sets according to the distance between the reforming main gas inlet pipe 110 and the reforming tubes 130, any two reforming tubes 130 which are positioned on both sides of the reforming main gas inlet pipe 110 and have the same distance with the reforming main gas inlet pipe are positioned in the same heating tube set, and the heating modules 160 on the outer walls of the reforming tubes 130 in each heating tube set work synchronously. The reason for this is that the temperature is more likely to decrease because the total distance that the alcohol vapor flows in the reforming tubes 130 that are located far from the reforming intake main tube 110 is greater, while the temperature is more likely to be maintained because the total distance that the alcohol vapor flows in the reforming tubes 130 that are located near the reforming intake main tube 110 is smaller. The difference of the temperature changes necessitates that different reforming tubes 130 are heated respectively, the temperature of the gas in each reforming tube 130 is conveniently, flexibly and accurately controlled, and the cracking efficiency is ensured.

In this embodiment, the heating module 160 is an insulated heating wire, and the heating wire is wound around the outer wall of the reforming tube 130. Heating wires in the same heating tube set are connected to the same heating control system, and synchronous heating or heating stopping of the heating wires is controlled according to needs.

For example, the total number of the reforming tubes 130 in this embodiment is 10, and there are 5 reforming tubes located on both sides of the reforming main gas inlet tube 110, wherein four heating tube sets located close to and on both sides of the reforming main gas inlet tube 110 are one heating tube set, and six heating tube sets located far from and on both sides of the reforming main gas inlet tube 110 are another heating tube set.

The inlet end of the reforming pipe 130 is snap-covered with a rear cover 131. The gas outlet end of the reforming pipe 130 is covered with a front cover 132 in a sealing manner, the front cover 132 is connected with the mixed gas branch pipe 140, the mixed gas branch pipe 140 and the reforming pipe 130 are arranged in a shared pipeline center line, the mixed gas branch pipe 140 is connected to the center of the front cover 132, a reformer separation net 133 is arranged on the inner side surface of the front cover 132, and the reformer separation net 133 shields the corresponding end part of the mixed gas branch pipe 140.

Referring to fig. 2, a first temperature measuring module 170 and a pressure measuring module 180 are provided near the alcohol vapor inlet joint 111 to monitor the operation state of the reformer. A second temperature measuring module 190 is disposed at the gas outlet end of the reforming pipe 130. In this embodiment, the gas outlet end of each reforming tube 130 is respectively provided with a second temperature measuring module 190. The temperature measured by the second temperature measuring module 190 is fed back to the heating control system, so as to control the heating wire to work or power off according to the operation requirement.

The first temperature measuring module 170 and the second temperature measuring module 190 have the same structure. Taking the second temperature measurement module 190 as an example, as shown in fig. 4, the second temperature measurement module includes a temperature sensor mounting tube 191, one end of the temperature sensor mounting tube 191 is fixedly connected to the reforming intake main tube 110, and the two tube cavities are communicated. A sealing gasket 192 is arranged on the free end surface of the temperature sensor mounting tube 191. Be provided with temperature sensor 195 on the temperature sensor installation pipe 191, the inductive head of this temperature sensor 195 stretches into in the temperature sensor installation pipe 191, fixed cover is equipped with the holding ring 193 on this temperature sensor 195, and this holding ring 193 supports and leans on seal ring 192, still the cover is equipped with lock nut 194 on the temperature sensor 195, and the one end integrated into one piece of this lock nut 194 has an annular end plate, and this annular end plate supports and leans on the holding ring 193, lock nut 194 with the free end outer wall threaded connection of temperature sensor installation pipe 191, so that the holding ring 193 will seal ring 192 supports tightly on the free end terminal surface of temperature sensor installation pipe 191 and seals.

The first temperature measurement module 170 is mounted on the reforming intake main pipe 110.

The pressure measuring module 180 comprises a pressure taking pipe 181, a pressure taking end of the pressure taking pipe 181 is communicated with the reforming air inlet main pipe 110, and the pressure taking end of the pressure taking pipe 181 is opposite to the alcohol steam inlet joint 111 and is respectively arranged on two sides of a pipe line of the reforming air inlet main pipe 110. The free end of the pressure tapping pipe 181 is provided with a pressure sensor assembly 182. In this way, the pressure at the alcohol vapor inlet 111 is facilitated to be conducted directly to the pressure sensor assembly 182.

The device is mainly heated by high-temperature gas supplied from the lower part, so that the reforming tubes 130 are horizontally arranged, full heating is facilitated, and the heating efficiency is improved. Meanwhile, in consideration of the fluctuation of the high-temperature gas heating, the non-uniformity of the heating in the center and edge regions, and the temperature difference caused by the difference in the flow distance when the alcohol vapor flows through the different reforming tubes 130, the heating wire is used as an auxiliary heating, and the temperature of the reforming tubes 130 can be finely controlled.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.

Claims

1. The utility model provides a methanol-water reforming hydrogen plant which characterized in that: the catalyst-free reforming device comprises a group of reforming tubes (130) which are arranged in parallel, wherein the two ends of each reforming tube (130) are respectively a gas inlet end and a gas outlet end, and the reforming tubes (130) are filled with catalysts;

the air inlet ends of all the reforming tubes (130) are connected with the same air inlet distribution tube group, the air inlet distribution tube group is provided with an alcohol vapor inlet joint (111), the air outlet ends of all the reforming tubes (130) are connected with the same air outlet collecting tube group, and the air outlet collecting tube group is provided with a mixed gas outlet joint (151);

the outer wall of the reforming pipe (130) is covered with a heating module (160).

2. The methanol-water reforming hydrogen production apparatus according to claim 1, characterized in that: the air inlet distribution pipe group comprises a reforming air inlet main pipe (110) and reforming air inlet branch pipes (120), wherein the reforming air inlet branch pipes (120) are arranged along the arrangement direction of the reforming pipes (130) and are respectively connected with the air inlet ends of all the reforming pipes (130);

the middle part of the reforming gas inlet branch pipe (120) is connected with one end of the reforming gas inlet main pipe (110), and the other end of the reforming gas inlet main pipe (110) is connected with the alcohol steam inlet joint (111);

the gas outlet collecting pipe group comprises gas mixture branch pipes (140) and gas mixture main pipes (150), the gas mixture main pipes (150) are arranged along the arrangement direction of the reforming pipes (130) and are respectively connected with the gas outlet ends of the reforming pipes (130) through the gas mixture branch pipes (140), and the middle parts of the gas mixture main pipes (150) are connected with gas mixture outlet connectors (151).

3. The methanol-water reforming hydrogen production apparatus according to claim 2, characterized in that: the reforming air inlet branch pipes (120) penetrate through all the reforming pipes (130), the pipe walls of the reforming air inlet branch pipes (120) are sealed with the pipe walls of the reforming pipes (130), air inlet holes (121) are respectively formed in the pipe walls of the reforming air inlet branch pipes (120) positioned in the reforming pipes (130), and the pipe cavities of the reforming air inlet branch pipes (120) are communicated with the pipe cavities of the reforming pipes (130) through the air inlet holes (121);

the reforming gas inlet branch pipes (120) are positioned on the pipe walls in the reforming pipes (130) and are respectively coated with a branch pipe isolation mesh enclosure (122).

4. The methanol-water reforming hydrogen production apparatus according to claim 2, characterized in that: the tube axes of all the reforming tubes (130) are positioned in the same horizontal plane, the two sides of the horizontal plane are respectively provided with the alcohol gas inlet joint (111) and the mixed gas outlet joint (151), the gas inlet end of the alcohol gas inlet joint (111) faces downwards, and the gas outlet end of the mixed gas outlet joint (151) faces upwards.

5. The methanol-water reforming hydrogen production apparatus according to claim 3, characterized in that: all the reforming tubes (130) are divided into at least two heating tube groups according to the distance between the reforming gas inlet main tube (110) and the reforming gas inlet main tube, any two reforming tubes (130) which are positioned at two sides of the reforming gas inlet main tube (110) and have the same distance with the reforming gas inlet main tube are positioned in the same heating tube group, and the heating modules (160) on the outer walls of the reforming tubes (130) in each heating tube group work synchronously.

6. The apparatus for hydrogen production by methanol-water reforming according to any one of claims 1 to 5, characterized in that: the heating module (160) is an insulated heating wire.

7. The methanol-water reforming hydrogen production apparatus according to claim 2, characterized in that: the air inlet end of the reforming pipe (130) is covered with a rear cover (131);

the gas outlet end of the reforming pipe (130) is covered with a front cover (132) in a sealing mode, the front cover (132) is connected with the mixed gas branch pipe (140), the mixed gas branch pipe (140) and the reforming pipe (130) are arranged in a mode of sharing a pipe center line, the mixed gas branch pipe (140) is connected to the center of the front cover (132), a reformer separation net (133) is arranged on the inner side face of the front cover (132), and the reformer separation net (133) shields the corresponding end portion of the mixed gas branch pipe (140).

8. The methanol-water reforming hydrogen production apparatus according to claim 2, characterized in that: a first temperature measuring module (170) and a pressure measuring module (180) are arranged close to the alcohol steam inlet joint (111);

and a second temperature measuring module (190) is arranged at the air outlet end of the reforming pipe (130).

9. The methanol-water reforming hydrogen production apparatus according to claim 8, characterized in that: the first temperature measuring module (170) and the second temperature measuring module (190) are identical in structure;

the second temperature measuring module (190) comprises a temperature sensor mounting pipe (191), one end of the temperature sensor mounting pipe (191) is fixedly connected with the reforming air inlet main pipe (110), and the pipe cavities of the temperature sensor mounting pipe and the reforming air inlet main pipe are communicated;

a sealing gasket (192) is arranged on the end face of the free end of the temperature sensor mounting pipe (191);

be provided with temperature sensor (195) on temperature sensor installation pipe (191), the inductive head of this temperature sensor (195) stretches into in temperature sensor installation pipe (191), fixed cover is equipped with holding ring (193) on this temperature sensor (195), and this holding ring (193) support and lean on seal ring (192), it is equipped with lock nut (194) still to overlap on temperature sensor (195), and the one end integrated into one piece of this lock nut (194) has annular end plate, and this annular end plate supports and leans on holding ring (193), lock nut (194) with the free end outer wall threaded connection of temperature sensor installation pipe (191), so that holding ring (193) will seal ring (192) support tightly on the free end terminal surface of temperature sensor installation pipe (191) and sealed.

10. The methanol-water reforming hydrogen production apparatus according to claim 8, characterized in that: the pressure measuring module (180) comprises a pressure taking pipe (181), the pressure taking end of the pressure taking pipe (181) is communicated with the reforming air inlet main pipe (110), and the pressure taking end of the pressure taking pipe (181) is opposite to the alcohol steam inlet joint (111) and is respectively arranged on two sides of the pipe axis of the reforming air inlet main pipe (110);

and the free end of the pressure sampling pipe (181) is provided with a pressure sensor assembly (182).